最佳答案
它以电能为动力,比地铁建设容易、造价低版、工期短。权 It uses the power as a driving force, is easier constructed, cheaper than the subway, and has shorter construction period.
它以电能为动力,比地铁建设容易、造价低版、工期短。权 It uses the power as a driving force, is easier constructed, cheaper than the subway, and has shorter construction period.